【英文标准名称】:Commercialclosed-circuittelevisionequipment
【原文标准名称】:商用闭路电视设备
【标准号】:UL2044-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997-06-26
【实施或试行日期】:
【发布单位】:美国保险商实验所(US-UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;接地;电气安全;安全;信号传输;信号;电视设备;电视接收机;电视系统;电视技术;试验;电视工程;视频设备;磁带录像机;视频放大器
【英文主题词】:Definition;Definitions;Earthing;Electricalsafety;Safety;Signaltransmission;Signals;Televisionequipment;Televisionreceivers;Televisionsystems;Televisiontechnology;Testing;Videoengineering;Videoequipment;Videotaperecorders;Videofrequencyamplifiers
【摘要】:1.1Theserequirementscoverclosed-circuittelevisionequipmentthat:a)AreintendedforcommercialuseonsupplycircuitsasdefinedintheNationalElectricalCode,NFPA70andb)Receivetheirsignalsfromavideo-recordedmediumorimage-producingdevicesinaclosedcircuittelevisionsystem.1.2Theserequirementscoverclosed-circuittelevisionequipment–suchasvideotaperecorders;video-receiving,-processing,-recording,-producing,and-amplificationequipment;videocameras;andthelike.1.3Theserequirementsalsocoverauxiliaryequipmentandaccessoriesintendedforusewithclosed-circuittelevisionsystems.1.4Theserequirementsalsocoverportableclosed-circuittelevisionequipmentofthetypesdescribedin1.2thatareintendedforusewithavehicular,marine,oranyotherbatterycircuitasthepowersupplymeans.1.5Theserequirementsdonotcovervideomonitors,astheseproductsarecoveredbytheStandardforAudio-VideoProductsandAccessories,UL1492,andtheStandardforSafetyofInformationTechnologyEquipmentIncludingElectricalBusinessEquipment,UL1950.1.5revisedFebruary6,20041.6Theserequirementsdonotcovervideocameraswithintegralelectronicviewfinders.1.7DeletedNovember2,20001.8Theserequirementsdonotcovertape-headdemagnetizersorbulktapeerasersintendedforusewithvideoproductsanddonotcovergeneral-purposetape-headdemagnetizersorbulktapeerasers,asthoseproductsarecoveredbytherequirementsforhouseholdandcommercialtaperecordersintheStandardforRadioReceivers,AudioSystems,andAccessories,UL1270,theStandardforAudio-VideoProductsandAccessories,UL1492,andtheStandardforCommercialAudioEquipment,UL813.1.9CommercialvideoproductsprovidedwithameansforreceivingcommerciallybroadcastedvideosignalsandhouseholdvideoproductsarecoveredbytheStandardforAudio-VideoProductsandAccessories,UL1492.1.9revisedFebruary6,20041.10AcartorstandthatisnotintendedtobeusedwithaspecificproductiscoveredbytheStandardforTallInstitutionalCartsforUseWithAudio-,Video-,andTelevision-TypeEquipment,UL1667,andtheStandardforHousehold,Commercial,andProfessional-UseCartsandStands,UL1678.1.11DeletedNovember9,2001
【中国标准分类号】:M70
【国际标准分类号】:33_160_99
【页数】:146P.;A4
【正文语种】:英语
基本信息
标准名称: | 血清中硒的氢化物发生-原子吸收光谱测定方法 |
英文名称: | Blood—Determination of selenium —Hydride geberation atomic absorption spectrometric method |
中标分类: |
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发布部门: | 中华人民共和国卫生部 |
发布日期: | 1999-01-21 |
实施日期: | 1999-07-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
主管部门: | 中华人民共和国卫生部 |
提出单位: | 卫生部卫生法制与监督司 |
起草单位: | 河南省新乡市职业病防治研究所、天津市劳动卫生职业病研究所 |
起草人: | 郝大情、张一敏、谢国红、田国均、刘黛莉 |
出版社: | 中国标准出版社 |
出版日期: | 2004-06-24 |
页数: | 6页 |
书号: | 155066.2-12560 |
适用范围
本标准规定了氢化物发生-原子吸收光谱法测定血清中硒浓弃的方法。
本标准适用于正常人和接触硒的作业人员血清中硒浓度的测定。
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